1 Introduction 3 't...._•. _,,_._,. A~~'-"~-' 1)' Scope of This Book l1.:ljStrength of Mate£ial,s-Basic Assumptions :vr; Elastic and Plastic Behavior LJ::4JAverage Stress and Strain rrS Tensile Deformation of Ductile Metal , .,,---.-- ~".,.- --. ",,' -- " .-' ." ," - -, -,,- ,-' /1-....